Does anybody have any suggestions for a good custom kernel for a Nexus 4? I am looking for something that will improve battery life without hindering performance as I like to play a few games on my down time. Also, I am new to custom kernels. So could somebody tell me how to install it and restore back to the stock kernel in case something goes wrong? I am currently on CM 10.1 nightly with ClockworkMod 18.104.22.168 recovery.